Niles: You actually convinced Dad I was trying to harm him?
Frasier: Oh, Niles, I did no such thing. I simply advanced a theory, I had no idea he would take it to heart.
Niles: Oh, balderdash.
Frasier: Please, Niles, surely it's occurred to you that your desire for Daphne is forcing you to behave in very strange ways. Or do you shove Dad down the stairs every day?
Niles: That was an accident.
Frasier: Oh, Niles, any psychiatrist worth his salt knows that there are no accidents. No one would do something like that, however unconsciously, unless they stood to gain from it.